Monolithically-integrated 3D printed coaxial bandpass filters and RF diplexers: single-band and dual-band

2021 ◽  
pp. 1-12
Author(s):  
Kunchen Zhao ◽  
Dimitra Psychogiou
Keyword(s):  
Low Cost ◽  
Bandpass Filters ◽  
Dual Band ◽  
Coupling Mechanism ◽  
Low Loss ◽  
Monolithically Integrated ◽  
Rf Components ◽  
Low Weight ◽  
Geometrical Features ◽  
3D Printed

Abstract The manuscript reports on additively-manufactured (AM) coaxial-resonator-based bandpass filters (BPFs) and RF diplexers. A monolithic integration concept using stereolithography apparatus (SLA) is proposed and discussed in detail. Coupled-resonator-based synthesis alongside full-electromagnetic-based design methods is used for the design of the monolithic filters and RF diplexers. In particular, the paper discusses a new external coupling mechanism for dual-band BPFs that allow to independently control the coupling in each of the BPF passbands. Furthermore, a novel coaxial transmission line-type T-junction is proposed for the design of single- and dual-band RF diplexers. For practical validation purposes, multiple BPF and RF diplexer prototypes were designed, manufactured and tested at S- and C-band demonstrating the applicability of the proposed concept to low-cost, low-loss and low-weight RF components with complex geometrical features.

scholarly journals Printable Materials for the Realization of High Performance RF Components: Challenges and Opportunities

2018 ◽  
Vol 2018 ◽  
pp. 1-19 ◽  
Author(s):  
Eva S. Rosker ◽  
Rajinder Sandhu ◽  
Jimmy Hester ◽  
Mark S. Goorsky ◽  
Jesse Tice
Keyword(s):  
Transmission Lines ◽  
High Performance ◽  
Low Cost ◽  
Ease Of Use ◽  
Multidisciplinary Teams ◽  
Direct Writing ◽  
Structure Property ◽  
Low Loss ◽  
Rf Components ◽  
Subtractive Manufacturing

Printing methods such as additive manufacturing (AM) and direct writing (DW) for radio frequency (RF) components including antennas, filters, transmission lines, and interconnects have recently garnered much attention due to the ease of use, efficiency, and low-cost benefits of the AM/DW tools readily available. The quality and performance of these printed components often do not align with their simulated counterparts due to losses associated with the base materials, surface roughness, and print resolution. These drawbacks preclude the community from realizing printed low loss RF components comparable to those fabricated with traditional subtractive manufacturing techniques. This review discusses the challenges facing low loss RF components, which has mostly been material limited by the robustness of the metal and the availability of AM-compatible dielectrics. We summarize the effective printing methods, review ink formulation, and the postprint processing steps necessary for targeted RF properties. We then detail the structure-property relationships critical to obtaining enhanced conductivities necessary for printed RF passive components. Finally, we give examples of demonstrations for various types of printed RF components and provide an outlook on future areas of research that will require multidisciplinary teams from chemists to RF system designers to fully realize the potential for printed RF components.

Low cost 3D Printed dual band antenna for mm Wave 5G Applications

2019 ◽  
Author(s):  
Guduguntla. Shivani ◽  
Karthikeya G.S ◽  
Dornala Santhoshi ◽  
D. Rama Krishna ◽  
Shiban K. Koul
Keyword(s):  
Low Cost ◽  
Dual Band ◽  
Dual Band Antenna ◽  
3D Printed

Additive Manufacturing of a Dual Band, Hybrid Substrate, and Dual Polarization Antenna

2021 ◽  
Vol 35 (11) ◽  
pp. 1282-1283
Author(s):  
Gregory Mitchell ◽  
Zachary Larimore ◽  
Paul Parsons
Keyword(s):  
Additive Manufacturing ◽  
Dual Band ◽  
Enabling Technology ◽  
Dual Polarization ◽  
Low Loss ◽  
Excellent Performance ◽  
Antenna Aperture ◽  
3D Printed ◽  
High Dielectric

We describe the additive manufacturing results pertaining to a multi-function antenna aperture. The antenna consists of customized high dielectric and low loss feedstocks as the enabling technology. The 3D printed prototype shows agreement with simulation while providing excellent performance.

scholarly journals Millimeter-Wave 3D-Printed Antenna Array based on Gap-Waveguide Technology and Split E-plane Waveguide

2021 ◽  
Author(s):  
Ángel Palomares-Caballero ◽  
Antonio Alex-Amor ◽  
Juan Valenzuela-Valdés ◽  
Pablo Padilla
Keyword(s):  
Antenna Array ◽  
Millimeter Wave ◽  
Low Cost ◽  
Design Procedure ◽  
Design Stage ◽  
Plane Waveguide ◽  
Wave Band ◽  
Low Weight ◽  
Millimeter Wave Band ◽  
3D Printed

A multilayer aperture antenna array in millimeter-wave band is presented in this article. The antenna array is based on glide-symmetric holey gap-waveguide technology combined with E-plane insertion gaps for a low-cost and low-loss design. The radiating part of the antenna array is formed by an array of sixteen aperture antennas, grouped in four sets of 2x2 antenna subarrays in E-plane configuration. The 2x2 subarrays are fed by a one-to-four corporate feeding network in E-plane with holey gap-waveguide technology. The antenna array has been manufactured with high precision stereolithography (SLA) and subsequent metal plating. This design procedure yields a low-cost and low-weight manufacturing process for functional prototypes. The complete array has been manufactured and measured, comparing its performance with the simulation results. Measurements show an input reflection coefficient below -10 dB which ranges from 68 GHz to 74 GHz. The measured radiation patterns suit adequately the defined ones in the design stage. Moreover, gain above 19 dBi in the entire operating frequency band is achieved with a 74.1% mean antenna efficiency. <br>

scholarly journals Millimeter-Wave 3D-Printed Antenna Array based on Gap-Waveguide Technology and Split E-plane Waveguide

2021 ◽  
Author(s):  
Ángel Palomares-Caballero ◽  
Antonio Alex-Amor ◽  
Juan Valenzuela-Valdés ◽  
Pablo Padilla
Keyword(s):  
Antenna Array ◽  
Millimeter Wave ◽  
Low Cost ◽  
Design Procedure ◽  
Design Stage ◽  
Plane Waveguide ◽  
Wave Band ◽  
Low Weight ◽  
Millimeter Wave Band ◽  
3D Printed

A multilayer aperture antenna array in millimeter-wave band is presented in this article. The antenna array is based on glide-symmetric holey gap-waveguide technology combined with E-plane insertion gaps for a low-cost and low-loss design. The radiating part of the antenna array is formed by an array of sixteen aperture antennas, grouped in four sets of 2x2 antenna subarrays in E-plane configuration. The 2x2 subarrays are fed by a one-to-four corporate feeding network in E-plane with holey gap-waveguide technology. The antenna array has been manufactured with high precision stereolithography (SLA) and subsequent metal plating. This design procedure yields a low-cost and low-weight manufacturing process for functional prototypes. The complete array has been manufactured and measured, comparing its performance with the simulation results. Measurements show an input reflection coefficient below -10 dB which ranges from 68 GHz to 74 GHz. The measured radiation patterns suit adequately the defined ones in the design stage. Moreover, gain above 19 dBi in the entire operating frequency band is achieved with a 74.1% mean antenna efficiency. <br>

Pioneering Low-Cost 3D-Printed Transtibial Prosthetics to Serve a Rural Population in Sierra Leone

2020 ◽  
Author(s):  
Merel van der Stelt ◽  
Martin P. Grobusch ◽  
Abdul R. Koroma ◽  
Marco Papenburg ◽  
Ismaila Kebbie ◽  
...  
Keyword(s):  
Sierra Leone ◽  
Rural Population ◽  
Low Cost ◽  
3D Printed
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